Grinding cup



FIG. 1 is a perspective view of the grinding cup;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a cross-sectional view of the grinding cup of FIG. 2 takenalong section line 8—8.

The ornamental design for a grinding cup, as shown and described.